Postural Strategies Employed by Orangutans (Pongo abelii) During Feeding in the Terminal Branch Niche
Postural Strategies Employed by Orangutans (Pongo abelii) During Feeding in the Terminal Branch Niche
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DOI：
10.1002/ajpa.21548
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发表时间：
2011-09-01
影响因子：
2.8
通讯作者：
Thorpe, S. K. S.
中科院分区：
文献类型：
--
作者：
Myatt, J. P.;Thorpe, S. K. S.
在树栖栖息地获取食物是复杂的，因为可用的支撑物具有不规则和灵活的性质。作为最大的以树栖动物为主的灵长类动物，猩猩被认为已经发展出特殊的姿势策略，使它们能够成功地进食。特别是，它们需要能够在末端分枝生态位(TBN)内处理，因为这是最小、最顺从的支撑物所在的地方，也是大多数果实和叶子所在的地方。我们记录了喂养姿势，以及来自不同年龄-性别类别的一些生态和行为变量，以分析这些变量和支架的顺应性之间的相互作用(根据僵硬分数估计)。所有年龄-性别等级的顺应性最好的支撑物上都使用了前弓方向的悬吊姿势，并通过分配体重和使用四肢在多个支撑物上保持平衡，似乎在促进TBN的安全使用方面发挥了特殊的作用。这与正交线悬浮液是为了满足TBN中的供料需求而发展起来的想法相矛盾。成年雄性似乎使用与其他年龄性别类别相同的姿势和喂食区，但由于其较大的身体质量，似乎在可能的情况下使用更坚硬的支撑。喂养方法在年龄-性别类别之间存在差异，与婴儿和青少年相比，较大的成年雄性因其较大的体型而承担较少的风险。Am J Phys Anthropol146：73-82,2011。(C)2011年C Wiley-Liss公司
Obtaining food in an arboreal habitat is complex due to the irregular and flexible nature of the supports available. As the largest predominantly arboreal primate, orangutans are expected to have developed particular postural strategies to enable them to feed successfully. In particular, they need to be able to cope within the terminal branch niche (TBN) as this is where the smallest, most compliant supports are, and also where the majority of the fruit and leaves are situated. We recorded feeding posture, along with a number of ecological and behavioral variables from different age-sex classes to enable analysis of the interactions between these and the compliance of the supports (as estimated from stiffness score). Suspensory postures with a pronograde orientation were used on the most compliant supports for all age-sex classes and appeared to play a particular role in facilitating safe use of the TBN by distributing body weight and using limbs for balance across multiple supports. This contradicts the idea that orthograde suspension evolved in response to the demands of feeding in the TBN. Adult males appear to use the same postures and feeding zones as the other age-sex classes, but appear to use stiffer supports where possible due to their larger body mass. Feeding method differed between the age-sex classes in relation to support stiffness, with larger adult males taking fewer risks due to their larger size, compared to infants and juveniles. Am J Phys Anthropol 146:73-82, 2011. (C)C 2011 Wiley-Liss, Inc.